Spray nozzle



Oct. l5, 1929.-

s. c; aLooM 1,731,813-

SPRAY NOZZLE Fild lay 13, 1927 Patented @et l5, 192i?) ra'rsnr orricn SAMUEL C. BLM, F CHICAGO, LLINOIS SPRAY NGZZLE Application filed. May 13,

This invention relates to improvements in spray nozzles and more especially to such a nozzle particularly adapted for producing a spray, or mist, of a cooling1 fluid, such as, for

5 example, brine.

Spray nozzles of the character described are frequently used in connection with refrigerating apparatus for producing a spray, or mist, of cooled brine to cool air.

@ne of the features of my invention is the production of such a nozzle that is reliable and erlicient in operation. My improved nozzle vvill produce an exceeding-ly fine mist, or

spray, and diffuse the same through a maxi-` 15 mum space.

My improved nozzle is also constructed so that it can be easily and readily cleaned. To this end, it is so constructed that all accumulations of dirt will remain in the removable 2o cap, thus permitting the cap to be taken off the nozzle and easily cleaned in an accessible position. This provision permitting' dirt to accumulate in the cap, instead of the base of the nozzle, also prevents any of such dirt from 25 falling back in the supply pipe during the cleaning' operation. ln many cases, also, the cleaning may be performed Without taking ott' the nozzle at all, or even removing the cap.

My improved nozzle is also so constructed 3o that the liability of clogging from particles of dirt is reduced to a minimum. Other features and advantages of my invention will appear more fully as l proceed with my speci.- lication.

ln that form of device embodying; the features of my invention shown in the accompanying drawings,

Fig. 1 is a top plan view of my improved nozzle; Fig. 2 is a view partly in side eleva tion and partly in section of the helical groove core forming; part of the nozzle; Fig. 3 is a vertical sectional vieiv of the complete nozzle; and lli l is a view similar to Fig. 3 showing the core retracted a short distance for the cleaning` operation.

As shown in the drawings, the nozzle comprises a base part 10 here shovvn as a threaded nipple, a cap 11 with a tapered chamber 11a y inside, and a correspondingly tapered helical grooved core 12 lying inside of the cap 11.

CAB

fio'

rea?. serial no. 191,155.

The base 10 is preferably provided with a shoulder 10a and the lower end of the cap 11 is provided with internal threads 11c for mounting it on the base. When thus mounted, its lower end is preferably in contact with the shoulder 1()IL in order to produce a liqnid tight joint. 101 indicates a Water-supply outlet in the base part and the outer end of this Water-supply outlet is enlarged on a taper, as indicated by 10, so that its diameter at the end is substantially equal to the diameter of the large end of the tapered chamber 11a in the cap 11.

The outer or small end of the tapered chamber 11n is provided with a spray aperture 11b.

As stated, 12 indicates a tapered core adapted to lie in the tapered chamber 11 of the cap 11. This core is provided with a double helical groove 12aM to divide the passinf; liquid into tivo streams and give them both a rotary motion to assist in forming the spray, or mist, issuing from the spray aperture 11b. It is to be particularly noted that the grooves 12 are substantially round in cross section, as shown in Fig. 2, instead ot being V-shaped, or flattened, as in the case of moet ordinary threads. That is, the bottom of each ofthe grooves 12a is rounded, as indicated by 12b (see Fig. 2). It will be seen that by forming; these `ogrooves substantially round in cross section, the liability of cloggingr is reduced to a minimum. That is, a groove which is substantially round in cross section will pass larger particles of dirt or obstructions per unit of area than a ,groove of any other shape. Such a groove also interposes less friction, or resistance, to the passage of fluidper unit of volume than a groove of any other shape, thus increasing the efficiency of the nozzle.

It is to be noted that the core 12 is somewhat shorter than the chamber 11a and When it is in position its forward end lies some distance from the spray aperture 11", thus leaving' in the smaller end of the cap l1 a mixing),r chamber, as indicated by 11d. As a matter of fact, this mixing chamber referred to as 11d constitutes the forward or smaller end of the entire tapered chamber 11l of the cap. The mixing chamber 11d permits the two streams 2 l Vi 1,731,813

v some distance froml the large end of the cap 11, thusvv forming a dirt chamber 11 which constitutes in fact the large end oi' the ta- It will be seen that any obstruction and particles of dirt that cannot pass the core 12 will; accumulate in this dirt chamber 11?, and it is to be particularly noted that this dirt chamber 11(a is in the cap so that all such f: accumulations of dirt and foreign material will lodge in the cap itself and not' in the base part 10. Consequently, when the nozzle is to be cleaned, the cap may be removed and the accumulation of dirt will thus Vbe taken away from the base in the cap, from which it can be easily cleaned out. By thus removing' the 'dirt with the cap, all likelihood of the dirt falling back in the vwater-.outlet 10b is eliminated. In connection with this cleaning of the nezzle, it is tol be particularly noted that the cleaning just referred to by removal of the cap is not always necessary.y In many cases, if the accumulationV of dirt is not too great, the nozzle may be cleaned without removing the cap lat all. This is accomplished by simply retractingfor pushing back the core 12 in the nozzle, as shown in Fig. 4. This may be done by forcing the point of a nail, or

fother small instrument, into the aperture 11bfto engage the core and push it back while a small stream of liquid is flowing. Suchl movement of the core ordinarily will loosenup dirt andpermit it to issue from the aperture 11b. llVhen the full pressure of liquid is again turned on, it forces the core back into` place in the cap as shown in Fig.

y. "3.' It is to benoted that the outer end of the water outlet 1()b is somewhat enlarged,

.' as indicated at 10, so that at the extreme endits `diameter is substantially the same as the diameter of the larger end of the chamber 11a. This .construction permits the core 12 to be retracted `down into the base,

as shown in Fig. 4.-, thus 'further assisting in thecleani-ng operation just referred to. It isto be noted, also that the enlargement 10c of the water outlet is tapered so that, withthe exception of the core 12, there are no shoulders, Vor abrupt edges, opposed againstjlthetravel ofv .liquid through the The, foregoing detailed description has ybeen given for, clearness of. understanding only,` and .nov .unnecessary limitations should beA understood therefrom, butr the .'.appendedclaims should be construedy as i broadly as permissible, in view -of the prior art.` l 1 f' AS sttdebeefithe Enlargement ,l0c 0f the water outlet is tapered. By means of this construction, the core 12 may be pressed into this tapered opening and jammed there, so that the cap 11 may be removed without danger of losing the core 12. Such jamming just referred to may be accomplished wheth er the nozzle is pointing horizontally or in a downward direction. By being able to push the core back into this tapered opening in the base, the removal and cleaning of the cap of the nozzle is greatly facilitated.

What I regard as new, and desire to secure by Letters Patent, is:

1. A spray nozzle of the character described comprising; a base part with a water supply outlet; a cap with a tapered chamber secured to the base part, the large end of the chamber being adjacent the water supply outlet, and the small end provided with a spray aperture; and a correspondingly tapered core with a helical groove on its outer surface lying in the tapered chamber in the cap, the inner end of said core beingr spaced from the outer end of the base part, the outer end of the water supply outlet in the base being enlarged on a taper to a diameter substantially equal to the diameter of the large end of the tapered chamber in the cap and the inner end of said water supply out-let having a diameter smaller than the larger diameter of the tapered core, whereby the core may be moved from the chamber in the cap into the tapered outer end of the water supply outlet in the base.

2. A spray nozzle as claimed in claim 1, in which the degree of taper of the outer end of the water supply outlet in the base is such that when the core is moved thereinto, it may be jammed in said outlet.

In witness whereof, I have hereunto set my hand this 11th day of May, 1927.

SAMUEL C. BLOOM. 

